<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>1_state简写形式</title>
</head>

<body>
    <div id="test"></div>
    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom库 -->
    <script type="text/javascript" src="../js/react-dom.development.js"></script>
    <!-- 引入babel 转换jsx的库 -->
    <script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">/* 此处要写babel */
        // 创建组件
        class Weather extends React.Component {
            // 初始化状态
            state = { isHot: true, isWindy: true }

            render() {
                const isHot = this.state.isHot;
                return (
                    <div>
                        <h1 onClick={this.changeWeather}>{`今天天气很${isHot ? '炎热' : '凉爽'} `}</h1>
                    </div>
                )
            }
            // 自定义方法：要用赋值语句+箭头函数
            changeWeather = () => {
                const isHot = this.state.isHot;
                this.setState({
                    isHot: !isHot
                })
            }
        }

        // ReactDOM.render 不再支持
        const root = ReactDOM.createRoot(document.getElementById('test'));
        root.render(<Weather />);


    </script>
</body>

</html>